Coastal Grade Mineral Pigment PPGL Color Coil Anti Fading Finish

Coastal Grade Mineral Pigment PPGL Color Coil Anti Fading Finish

Organic pigments fade because ultraviolet radiation breaks the chemical bonds that create their color. Inorganic mineral pigments do not break down the same way, which is why they hold their shade far longer on a sun exposed roof. This coastal grade PPGL color coil uses mineral based pigments supported by a UV stable binder, on an aluzinc substrate selected for chloride exposure.

The trade off is worth stating plainly: mineral pigments cover a narrower shade range than organic ones and cost more. For deep reds, blues and greens on a coastal facade, though, they are the difference between a roof that still looks like the sample after ten years and one that has visibly drifted.

Coil Parameters

Why Mineral Pigments Last

• Inorganic pigment chemistry resists UV breakdown, so the shade holds rather than drifting.
• Higher pigment loading gives better opacity, which reduces substrate show through on dark shades.
• Aluzinc AZ150 substrate handles chloride exposure at cut edges and laps.
• UV stable binder slows gloss loss even where pigments are already stable.
• Longer color life means fewer repaint cycles on hard to access roofs.

Coastal Project Types

• Seaside hotels, resorts and villas
• Marine terminals and harbor buildings
• Coastal industrial facilities and desalination plants
• Exposed hilltop or clifftop residential roofing

Frequently Asked Questions

Are mineral pigments available in every RAL color?

No. Bright saturated blues, purples and some greens cannot be matched with purely inorganic chemistry. We advise the nearest achievable mineral shade and show the difference before you commit.

How much does the upgrade cost?

Typically eight to fifteen percent above a standard organic pigment system, depending on the shade and the loading required to reach the target hide.

Does anti fading pigment also resist chalking?

The pigment resists color change, while the binder resists chalking. Both are needed, which is why this coil combines mineral pigment with a UV stabilized resin rather than relying on pigment alone.

Can this coil be used inland?

Yes, and it is often chosen for inland roofs in high altitude or high sun regions where UV intensity is the main threat rather than salt.

Packing

Coils ship eye to sky with PVC film, paper interleaving and steel strapping on wooden pallets, labelled with heat number, coating batch and pigment system. For long sea voyages to coastal destinations we add desiccant and a heavier wrap to keep condensation from marking the surface in transit.

Comparison Guidance

When comparing a mineral pigment offer against a standard organic offer, compare the shade number and the pigment system, not just the price per ton. Two coils that look identical on a swatch can behave very differently after five summers, and the difference only becomes visible on a large roof where a color shift has nowhere to hide.

The substrate is Aluzinc AZ150. The AZ designation describes the aluminium-zinc alloy coating weight, which is what gives cut edges and drilled holes their sacrificial protection. A higher coating weight extends time to red rust, but it also changes forming behaviour, so the grade should be matched to the exposure class of the finished building.

Coating thickness matters more than coating brand in service: Top 25 - 30 micron, primer 5 - 7 micron. Below roughly 20 micron total build, UV exposure in strong sun starts to chalk the surface within a few years, and the colour drifts before the steel itself shows any problem.

Formability is specified as T bend 2T at 0.5 mm gauge. This determines whether the strip can be roll formed and folded at the job site without cracking the coating over the bend radius, which is the most common cause of premature coating failure on roofing panels.